Pengukuran tangki penyimpanan bahan bakar minyak (solar) merupakan hal yang penting dan harus dilakukan oleh beberapa perusahaan industri. Di beberapa perusahaan industri ada yang masih menggunakan pengukuran tangki penyimpanan bahan bakar secara manual atau pengukuran secara langsung, namun hasil yang diperoleh tidak akurat apalagi jika cuaca tidak mendukung sehingga menyebabkan kurangnya pencahayaan. Penelitian disini, melakukan monitoring tangki penyimpanan solar secara real time berbasis internet of things (IoT) menggunakan sensor SRF04 dan menggunakan pengontrol utama NodeMcu ESP8266, sehingga dapat dilakukan pengkuran level tangki dengan mudah karena tidak perlu lagi melakukan pengukuran secara manual menggunakan tongkat besi pengukur. Komunikasi data jarak jauh dan uji coba tingkat akurasi data menunjukkan bahwa sistem monitoring ini dapat memberikan data akurat dan real time. Alat ini bekerja dengan memancarkan transmitter sensor ultrasonik dan mengeluarkan gelombang ultrasonic, kemudian diterima kembali oleh receiver ultrasonik dan di proses pada nodemcu dan ditampilkan pada lcd dan aplikasi Blynk. Blynk juga dapat mengatur on/off pompa melalui relay yang terhubung pada nodemcu. Dari simulasi pengujian yang dilakukan diperoleh total persentase kesalahan sebesar 0.10 % dan total nilai error sebesar 0.12 ml.
Novel Coronavirus 2019 (covid-19) is a generation of the coronavirus that humans have never identified. This virus was first reported to cause an outbreak in Wuhan, China, in December 2019. Until now, covid-19 infection cases have been reported in many countries, such as Thailand, Japan, South Korea, Iran, Italy, Germany, and more than 90 countries worldwide. Until November 1, 2020, a total of 412.784 positive cases of covid-19 were recorded, with 341.942 recovered patients and 13.943 deaths in Indonesia. The purpose of this event is to anticipate the spread of Covid-19 by reminding the public to maintain health protocols and other alternatives in preserving health, also increasing body immunity through massage and traditional Indonesian herbal medicine. This event received a good response from the public. It was evidenced by the number of participants exceeding the predetermined quota and enthusiastic in following the speaker's material. The event was a success and was well received by the participants as well as the local government. After following this event, participants can practise the knowledge obtained from the presenters to maintain and protect their health and immunity from Covid-19. Keywords: Covid-19, Community service, body immunity DAFTAR PUSTAKA Amri, Sofan. Iif Khoiru Ahmadi. 2010. Proses Pembelajaran Kreatif dan Inovatif Dalam Kelas: Metode, Landasan Teoritis-Praktis dan Penerapannya. Jakarta: PT. Prestasi Pustakaraya. Badan Pusat Statistik Kota Surabaya. “Jumlah RT RW Kecamatan Dukuh Pakis Menurut Kelurahan Tahun 2017”. surabayakota.bps.go.id. https://surabayakota.bps.go.id/statictable/2018/04/19/594/jumlah-rt-rw-kecamatan-dukuh-pakis-menurut-kelurahan-tahun-2017.html. (diakses 15 Desember 2020). Huang C, Wang Y, Li X, Ren L, Zhao J, Hu Y, Zhang L, Fan G, Xu J, Gu X, Cheng Z. 2020. “Clinical features of patients infected with 2019 novel coronavirus in Wuhan, China”. Lancet 2020: 395: 497-506. doi: https://doi.org/10.1016/S0140-6736(20)30183-5. Kementerian Kesehatan Republik Indonesia. 2020. Pedoman Kesiapsiagaan Menghadapi Coronavirus Disease (covid-19). Jakarta: Direktorat Jenderal Pencegahan dan Pengendalian Penyakit (P2P). Komite Penanganan Covid-19 dan Pemulihan Ekonomi Nasional. “Pasien Sembuh Harian Mencapai 4.141 Orang”. covid19.go.id. https://covid19.go.id/berita/pasien-sembuh-harian-mencapai-4141-orang. (diakses 15 Desember 2020). Kumar, M., & Dwivedi, S. 2020. “Impact of Coronavirus Imposed Lockdown on Indian Population and their Habits”. International Journal of Science and Healthcare Research Vol.5 Issue: 2: April-June 2020. ISSN: 2455-7587. Li, S., Wang, Y., Xue, J., Zhao, N., & Zhu, T. 2020. “The impact of covid-19 epidemic declaration on psychological consequences: A study on active weibo users”. International Journal of Environmental Research and Public Health, 17(6), 1–9. doi: https://doi.org/10.3390/ijerph17062032. Pemerintah Kota Surabaya, “Statistik”. lawancovid-19.surabaya.go.id. https://lawancovid-19.surabaya.go.id/visualisasi/graph. (diakses 15 Desember 2020). Rizma Riyandi. “Data Kecamatan Surabaya: Dukuh Pakis, Penduduk dan Wilayah”. ayosurabaya.com. https://www.ayosurabaya.com/read/2020/09/28/3230/data-kecamatan-surabaya-dukuh-pakis-penduduk-dan-wilayah. (diakses 15 Desember 2020). Zhu N, Zhang D, Wang W, Li X, Yang B, Song J, Zhao X, Huang B, Shi W, Lu R, Niu P. 2020. “A novel coronavirus from patients with pneumonia in China, 2019”. New England Journal of Medicine 2020: 382: 727-733. doi: 10.1056/NEJMoa2001017
The number of fake lubricants in Indonesia has made many people nervous. In 2008, 50% to 60% of lubricants that already existed in Indonesia were fake, therefore carefulness was needed in choosing these lubricating products. The first step that can be done to identify fake lubricants is to recognize by its color. Therefore, this research aims to design a device that is able to recognize the color of lubricants using a webcam. The research sample is base oil with levels of red and blue, each of which is 0 ppm, 10 ppm, 50 ppm, 100 ppm, 150 ppm, and 200 ppm. This sample is characterized by the color composition used as a reference system, then tested to identify other samples. Characterization is done by placing a sample on a cuvette and inserting it into the sample room with adequate lighting. The web camera is used to take sample pictures, then the image is analyzed based on color composition. Based on the results of tests that have been conducted, it shows that this system is able to identify 100% lubricant samples correctly. These results indicate that it is very possible to develop an early detection method for lubricating oil based on the composition of the colors using a webcam.
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